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D01.0

Billable

Carcinoma in situ of colon

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

Abnormal cells found in the colon that have the potential to become cancer but have not yet invaded deeper tissues.

Coding Tips

  • This is a pre-cancerous condition, not invasive cancer; document the specific location within the colon if available
  • Distinguish from invasive colorectal cancer (C18.x codes) and benign polyps

Excludes 1 — Do NOT code together

  • carcinoma in situ of rectosigmoid junction (D01.1)

Code Hierarchy

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